/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package vip.zhenzicheng.rocketmq.api.simple;

import org.apache.rocketmq.client.consumer.DefaultLitePullConsumer;
import org.apache.rocketmq.common.message.MessageExt;
import org.apache.rocketmq.common.message.MessageQueue;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * 新版pull模式，定制版
 */
public class LitePullConsumerAssign {

  public static volatile boolean running = true;

  public static void main(String[] args) throws Exception {
    DefaultLitePullConsumer litePullConsumer = new DefaultLitePullConsumer("please_rename_unique_group_name");
    litePullConsumer.setAutoCommit(false);
    litePullConsumer.start();
    Collection<MessageQueue> mqSet = litePullConsumer.fetchMessageQueues("TopicTest");
    List<MessageQueue> list = new ArrayList<>(mqSet);
    List<MessageQueue> assignList = new ArrayList<>();
    for (int i = 0; i < list.size() / 2; i++) {
      assignList.add(list.get(i));
    }
    litePullConsumer.assign(assignList);
    litePullConsumer.seek(assignList.get(0), 10);
    try {
      while (running) {
        List<MessageExt> messageExts = litePullConsumer.poll();
        System.out.printf("%s %n", messageExts);
        litePullConsumer.commitSync();
      }
    } finally {
      litePullConsumer.shutdown();
    }

  }
}
